2 Copyright (C) 2000-2006 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 #include <sigc++/bind.h>
28 #include <sigc++/class_slot.h>
30 #include <glibmm/thread.h>
32 #include <pbd/basename.h>
33 #include <pbd/xml++.h>
35 #include <ardour/audioregion.h>
36 #include <ardour/session.h>
37 #include <ardour/gain.h>
38 #include <ardour/dB.h>
39 #include <ardour/playlist.h>
40 #include <ardour/audiofilter.h>
41 #include <ardour/audiosource.h>
47 using namespace ARDOUR;
49 /* a Session will reset these to its chosen defaults by calling AudioRegion::set_default_fade() */
51 Change AudioRegion::FadeInChanged = ARDOUR::new_change();
52 Change AudioRegion::FadeOutChanged = ARDOUR::new_change();
53 Change AudioRegion::FadeInActiveChanged = ARDOUR::new_change();
54 Change AudioRegion::FadeOutActiveChanged = ARDOUR::new_change();
55 Change AudioRegion::EnvelopeActiveChanged = ARDOUR::new_change();
56 Change AudioRegion::ScaleAmplitudeChanged = ARDOUR::new_change();
57 Change AudioRegion::EnvelopeChanged = ARDOUR::new_change();
59 AudioRegionState::AudioRegionState (string why)
61 , _fade_in (0.0, 2.0, 1.0, false)
62 , _fade_out (0.0, 2.0, 1.0, false)
63 , _envelope (0.0, 2.0, 1.0, false)
67 /** Basic AudioRegion constructor (one channel) */
68 AudioRegion::AudioRegion (boost::shared_ptr<AudioSource> src, jack_nframes_t start, jack_nframes_t length)
69 : Region (src, start, length, PBD::basename_nosuffix(src->name()), DataType::AUDIO, 0, Region::Flag(Region::DefaultFlags|Region::External)),
70 _fade_in (0.0, 2.0, 1.0, false),
71 _fade_out (0.0, 2.0, 1.0, false),
72 _envelope (0.0, 2.0, 1.0, false)
74 _scale_amplitude = 1.0;
77 set_default_envelope ();
79 save_state ("initial state");
81 _envelope.StateChanged.connect (mem_fun (*this, &AudioRegion::envelope_changed));
84 /* Basic AudioRegion constructor (one channel) */
85 AudioRegion::AudioRegion (boost::shared_ptr<AudioSource> src, jack_nframes_t start, jack_nframes_t length, const string& name, layer_t layer, Flag flags)
86 : Region (src, start, length, name, DataType::AUDIO, layer, flags)
87 , _fade_in (0.0, 2.0, 1.0, false)
88 , _fade_out (0.0, 2.0, 1.0, false)
89 , _envelope (0.0, 2.0, 1.0, false)
91 _scale_amplitude = 1.0;
94 set_default_envelope ();
95 save_state ("initial state");
97 _envelope.StateChanged.connect (mem_fun (*this, &AudioRegion::envelope_changed));
100 /* Basic AudioRegion constructor (many channels) */
101 AudioRegion::AudioRegion (SourceList& srcs, jack_nframes_t start, jack_nframes_t length, const string& name, layer_t layer, Flag flags)
102 : Region (srcs, start, length, name, DataType::AUDIO, layer, flags)
103 , _fade_in (0.0, 2.0, 1.0, false)
104 , _fade_out (0.0, 2.0, 1.0, false)
105 , _envelope (0.0, 2.0, 1.0, false)
107 _scale_amplitude = 1.0;
109 set_default_fades ();
110 set_default_envelope ();
111 save_state ("initial state");
113 _envelope.StateChanged.connect (mem_fun (*this, &AudioRegion::envelope_changed));
117 /** Create a new AudioRegion, that is part of an existing one */
118 AudioRegion::AudioRegion (boost::shared_ptr<const AudioRegion> other, jack_nframes_t offset, jack_nframes_t length, const string& name, layer_t layer, Flag flags)
119 : Region (other, offset, length, name, layer, flags),
120 _fade_in (other->_fade_in),
121 _fade_out (other->_fade_out),
122 _envelope (other->_envelope, (double) offset, (double) offset + length)
124 /* return to default fades if the existing ones are too long */
125 _fade_in_disabled = 0;
126 _fade_out_disabled = 0;
129 if (_flags & LeftOfSplit) {
130 if (_fade_in.back()->when >= _length) {
131 set_default_fade_in ();
133 _fade_in_disabled = other->_fade_in_disabled;
135 set_default_fade_out ();
136 _flags = Flag (_flags & ~Region::LeftOfSplit);
139 if (_flags & RightOfSplit) {
140 if (_fade_out.back()->when >= _length) {
141 set_default_fade_out ();
143 _fade_out_disabled = other->_fade_out_disabled;
145 set_default_fade_in ();
146 _flags = Flag (_flags & ~Region::RightOfSplit);
149 _scale_amplitude = other->_scale_amplitude;
151 save_state ("initial state");
153 _envelope.StateChanged.connect (mem_fun (*this, &AudioRegion::envelope_changed));
155 assert(_type == DataType::AUDIO);
158 AudioRegion::AudioRegion (boost::shared_ptr<const AudioRegion> other)
160 _fade_in (other->_fade_in),
161 _fade_out (other->_fade_out),
162 _envelope (other->_envelope)
164 _scale_amplitude = other->_scale_amplitude;
165 _envelope = other->_envelope;
167 _fade_in_disabled = 0;
168 _fade_out_disabled = 0;
170 save_state ("initial state");
172 _envelope.StateChanged.connect (mem_fun (*this, &AudioRegion::envelope_changed));
174 assert(_type == DataType::AUDIO);
177 AudioRegion::AudioRegion (boost::shared_ptr<AudioSource> src, const XMLNode& node)
179 , _fade_in (0.0, 2.0, 1.0, false)
180 , _fade_out (0.0, 2.0, 1.0, false)
181 , _envelope (0.0, 2.0, 1.0, false)
183 set_default_fades ();
185 if (set_state (node)) {
186 throw failed_constructor();
189 save_state ("initial state");
191 _envelope.StateChanged.connect (mem_fun (*this, &AudioRegion::envelope_changed));
193 assert(_type == DataType::AUDIO);
196 AudioRegion::AudioRegion (SourceList& srcs, const XMLNode& node)
197 : Region (srcs, node),
198 _fade_in (0.0, 2.0, 1.0, false),
199 _fade_out (0.0, 2.0, 1.0, false),
200 _envelope (0.0, 2.0, 1.0, false)
202 set_default_fades ();
203 _scale_amplitude = 1.0;
205 if (set_state (node)) {
206 throw failed_constructor();
209 save_state ("initial state");
211 _envelope.StateChanged.connect (mem_fun (*this, &AudioRegion::envelope_changed));
213 assert(_type == DataType::AUDIO);
216 AudioRegion::~AudioRegion ()
218 GoingAway (); /* EMIT SIGNAL */
222 AudioRegion::state_factory (std::string why) const
224 AudioRegionState* state = new AudioRegionState (why);
226 Region::store_state (*state);
228 state->_fade_in = _fade_in;
229 state->_fade_out = _fade_out;
230 state->_envelope = _envelope;
231 state->_scale_amplitude = _scale_amplitude;
232 state->_fade_in_disabled = _fade_in_disabled;
233 state->_fade_out_disabled = _fade_out_disabled;
239 AudioRegion::restore_state (StateManager::State& sstate)
241 AudioRegionState* state = dynamic_cast<AudioRegionState*> (&sstate);
243 Change what_changed = Region::restore_and_return_flags (*state);
245 if (_flags != Flag (state->_flags)) {
247 uint32_t old_flags = _flags;
249 _flags = Flag (state->_flags);
251 if ((old_flags ^ state->_flags) & EnvelopeActive) {
252 what_changed = Change (what_changed|EnvelopeActiveChanged);
256 if (!(_fade_in == state->_fade_in)) {
257 _fade_in = state->_fade_in;
258 what_changed = Change (what_changed|FadeInChanged);
261 if (!(_fade_out == state->_fade_out)) {
262 _fade_out = state->_fade_out;
263 what_changed = Change (what_changed|FadeOutChanged);
266 if (_scale_amplitude != state->_scale_amplitude) {
267 _scale_amplitude = state->_scale_amplitude;
268 what_changed = Change (what_changed|ScaleAmplitudeChanged);
271 if (_fade_in_disabled != state->_fade_in_disabled) {
272 if (_fade_in_disabled == 0 && state->_fade_in_disabled) {
273 set_fade_in_active (false);
274 } else if (_fade_in_disabled && state->_fade_in_disabled == 0) {
275 set_fade_in_active (true);
277 _fade_in_disabled = state->_fade_in_disabled;
280 if (_fade_out_disabled != state->_fade_out_disabled) {
281 if (_fade_out_disabled == 0 && state->_fade_out_disabled) {
282 set_fade_out_active (false);
283 } else if (_fade_out_disabled && state->_fade_out_disabled == 0) {
284 set_fade_out_active (true);
286 _fade_out_disabled = state->_fade_out_disabled;
289 /* XXX need a way to test stored state versus current for envelopes */
291 _envelope = state->_envelope;
292 what_changed = Change (what_changed);
298 AudioRegion::get_memento() const
300 return sigc::bind (mem_fun (*(const_cast<AudioRegion *> (this)), &StateManager::use_state), _current_state_id);
304 AudioRegion::set_envelope_active (bool yn)
306 if (envelope_active() != yn) {
309 snprintf (buf, sizeof (buf), "envelope active");
310 _flags = Flag (_flags|EnvelopeActive);
312 snprintf (buf, sizeof (buf), "envelope off");
313 _flags = Flag (_flags & ~EnvelopeActive);
318 send_change (EnvelopeActiveChanged);
324 AudioRegion::read_peaks (PeakData *buf, jack_nframes_t npeaks, jack_nframes_t offset, jack_nframes_t cnt, uint32_t chan_n, double samples_per_unit) const
326 if (chan_n >= _sources.size()) {
330 if (audio_source(chan_n)->read_peaks (buf, npeaks, offset, cnt, samples_per_unit)) {
333 if (_scale_amplitude != 1.0) {
334 for (jack_nframes_t n = 0; n < npeaks; ++n) {
335 buf[n].max *= _scale_amplitude;
336 buf[n].min *= _scale_amplitude;
344 AudioRegion::read_at (Sample *buf, Sample *mixdown_buffer, float *gain_buffer, jack_nframes_t position,
346 uint32_t chan_n, jack_nframes_t read_frames, jack_nframes_t skip_frames) const
348 return _read_at (_sources, buf, mixdown_buffer, gain_buffer, position, cnt, chan_n, read_frames, skip_frames);
352 AudioRegion::master_read_at (Sample *buf, Sample *mixdown_buffer, float *gain_buffer, jack_nframes_t position,
353 jack_nframes_t cnt, uint32_t chan_n) const
355 return _read_at (_master_sources, buf, mixdown_buffer, gain_buffer, position, cnt, chan_n, 0, 0);
359 AudioRegion::_read_at (const SourceList& srcs, Sample *buf, Sample *mixdown_buffer, float *gain_buffer,
360 jack_nframes_t position, jack_nframes_t cnt,
361 uint32_t chan_n, jack_nframes_t read_frames, jack_nframes_t skip_frames) const
363 jack_nframes_t internal_offset;
364 jack_nframes_t buf_offset;
365 jack_nframes_t to_read;
367 /* precondition: caller has verified that we cover the desired section */
369 if (chan_n >= _sources.size()) {
370 return 0; /* read nothing */
373 if (position < _position) {
375 buf_offset = _position - position;
378 internal_offset = position - _position;
382 if (internal_offset >= _length) {
383 return 0; /* read nothing */
387 if ((to_read = min (cnt, _length - internal_offset)) == 0) {
388 return 0; /* read nothing */
392 /* overwrite whatever is there */
393 mixdown_buffer = buf + buf_offset;
395 mixdown_buffer += buf_offset;
399 return 0; /* read nothing */
402 _read_data_count = 0;
404 boost::shared_ptr<AudioSource> src = audio_source(chan_n);
405 if (src->read (mixdown_buffer, _start + internal_offset, to_read) != to_read) {
406 return 0; /* "read nothing" */
409 _read_data_count += src->read_data_count();
413 if (_flags & FadeIn) {
415 jack_nframes_t fade_in_length = (jack_nframes_t) _fade_in.back()->when;
417 /* see if this read is within the fade in */
419 if (internal_offset < fade_in_length) {
421 jack_nframes_t limit;
423 limit = min (to_read, fade_in_length - internal_offset);
425 _fade_in.get_vector (internal_offset, internal_offset+limit, gain_buffer, limit);
427 for (jack_nframes_t n = 0; n < limit; ++n) {
428 mixdown_buffer[n] *= gain_buffer[n];
435 if (_flags & FadeOut) {
440 /* see if some part of this read is within the fade out */
442 /* ................. >| REGION
448 _length - fade_out_length
451 ^internal_offset + to_read
453 we need the intersection of [internal_offset,internal_offset+to_read] with
454 [_length - fade_out_length, _length]
459 jack_nframes_t fade_out_length = (jack_nframes_t) _fade_out.back()->when;
460 jack_nframes_t fade_interval_start = max(internal_offset, _length-fade_out_length);
461 jack_nframes_t fade_interval_end = min(internal_offset + to_read, _length);
463 if (fade_interval_end > fade_interval_start) {
464 /* (part of the) the fade out is in this buffer */
466 jack_nframes_t limit = fade_interval_end - fade_interval_start;
467 jack_nframes_t curve_offset = fade_interval_start - (_length-fade_out_length);
468 jack_nframes_t fade_offset = fade_interval_start - internal_offset;
470 _fade_out.get_vector (curve_offset,curve_offset+limit, gain_buffer, limit);
472 for (jack_nframes_t n = 0, m = fade_offset; n < limit; ++n, ++m) {
473 mixdown_buffer[m] *= gain_buffer[n];
479 /* Regular gain curves */
481 if (envelope_active()) {
482 _envelope.get_vector (internal_offset, internal_offset + to_read, gain_buffer, to_read);
484 if (_scale_amplitude != 1.0f) {
485 for (jack_nframes_t n = 0; n < to_read; ++n) {
486 mixdown_buffer[n] *= gain_buffer[n] * _scale_amplitude;
489 for (jack_nframes_t n = 0; n < to_read; ++n) {
490 mixdown_buffer[n] *= gain_buffer[n];
493 } else if (_scale_amplitude != 1.0f) {
494 Session::apply_gain_to_buffer (mixdown_buffer, to_read, _scale_amplitude);
499 /* gack. the things we do for users.
504 for (jack_nframes_t n = 0; n < to_read; ++n) {
505 buf[n] += mixdown_buffer[n];
513 AudioRegion::state (bool full)
515 XMLNode& node (Region::state (full));
519 LocaleGuard lg (X_("POSIX"));
521 snprintf (buf, sizeof (buf), "0x%x", (int) _flags);
522 node.add_property ("flags", buf);
523 snprintf (buf, sizeof(buf), "%.12g", _scale_amplitude);
524 node.add_property ("scale-gain", buf);
526 for (uint32_t n=0; n < _sources.size(); ++n) {
527 snprintf (buf2, sizeof(buf2), "source-%d", n);
528 _sources[n]->id().print (buf);
529 node.add_property (buf2, buf);
532 snprintf (buf, sizeof (buf), "%u", (uint32_t) _sources.size());
533 node.add_property ("channels", buf);
537 child = node.add_child (X_("FadeIn"));
539 if ((_flags & DefaultFadeIn)) {
540 child->add_property (X_("default"), X_("yes"));
542 _fade_in.store_state (*child);
545 child = node.add_child (X_("FadeOut"));
547 if ((_flags & DefaultFadeOut)) {
548 child->add_property (X_("default"), X_("yes"));
550 _fade_out.store_state (*child);
554 child = node.add_child ("Envelope");
557 bool default_env = false;
559 // If there are only two points, the points are in the start of the region and the end of the region
560 // so, if they are both at 1.0f, that means the default region.
561 if (_envelope.size() == 2 &&
562 _envelope.front()->value == 1.0f &&
563 _envelope.back()->value==1.0f) {
564 if (_envelope.front()->when == 0 && _envelope.back()->when == _length) {
570 child->add_property ("default", "yes");
572 _envelope.store_state (*child);
575 child->add_property ("default", "yes");
578 if (full && _extra_xml) {
579 node.add_child_copy (*_extra_xml);
586 AudioRegion::set_state (const XMLNode& node)
588 const XMLNodeList& nlist = node.children();
589 const XMLProperty *prop;
590 LocaleGuard lg (X_("POSIX"));
592 Region::set_state (node);
594 if ((prop = node.property ("flags")) != 0) {
595 _flags = Flag (strtol (prop->value().c_str(), (char **) 0, 16));
597 _flags = Flag (_flags & ~Region::LeftOfSplit);
598 _flags = Flag (_flags & ~Region::RightOfSplit);
601 if ((prop = node.property ("scale-gain")) != 0) {
602 _scale_amplitude = atof (prop->value().c_str());
604 _scale_amplitude = 1.0;
607 /* Now find envelope description and other misc child items */
609 for (XMLNodeConstIterator niter = nlist.begin(); niter != nlist.end(); ++niter) {
616 if (child->name() == "Envelope") {
620 if ((prop = child->property ("default")) != 0) {
621 set_default_envelope ();
623 _envelope.load_state (*child);
626 _envelope.set_max_xval (_length);
627 _envelope.truncate_end (_length);
629 } else if (child->name() == "FadeIn") {
633 if ((prop = child->property ("default")) != 0 || (prop = child->property ("steepness")) != 0) {
634 set_default_fade_in ();
637 _fade_in.load_state (*child);
640 } else if (child->name() == "FadeOut") {
644 if ((prop = child->property ("default")) != 0 || (prop = child->property ("steepness")) != 0) {
645 set_default_fade_out ();
647 _fade_out.load_state (*child);
656 AudioRegion::set_fade_in_shape (FadeShape shape)
658 set_fade_in (shape, (jack_nframes_t) _fade_in.back()->when);
662 AudioRegion::set_fade_out_shape (FadeShape shape)
664 set_fade_out (shape, (jack_nframes_t) _fade_out.back()->when);
668 AudioRegion::set_fade_in (FadeShape shape, jack_nframes_t len)
675 _fade_in.add (0.0, 0.0);
676 _fade_in.add (len, 1.0);
681 _fade_in.add (len * 0.389401, 0.0333333);
682 _fade_in.add (len * 0.629032, 0.0861111);
683 _fade_in.add (len * 0.829493, 0.233333);
684 _fade_in.add (len * 0.9447, 0.483333);
685 _fade_in.add (len * 0.976959, 0.697222);
686 _fade_in.add (len, 1);
691 _fade_in.add (len * 0.0207373, 0.197222);
692 _fade_in.add (len * 0.0645161, 0.525);
693 _fade_in.add (len * 0.152074, 0.802778);
694 _fade_in.add (len * 0.276498, 0.919444);
695 _fade_in.add (len * 0.481567, 0.980556);
696 _fade_in.add (len * 0.767281, 1);
697 _fade_in.add (len, 1);
702 _fade_in.add (len * 0.0737327, 0.308333);
703 _fade_in.add (len * 0.246544, 0.658333);
704 _fade_in.add (len * 0.470046, 0.886111);
705 _fade_in.add (len * 0.652074, 0.972222);
706 _fade_in.add (len * 0.771889, 0.988889);
707 _fade_in.add (len, 1);
712 _fade_in.add (len * 0.304147, 0.0694444);
713 _fade_in.add (len * 0.529954, 0.152778);
714 _fade_in.add (len * 0.725806, 0.333333);
715 _fade_in.add (len * 0.847926, 0.558333);
716 _fade_in.add (len * 0.919355, 0.730556);
717 _fade_in.add (len, 1);
722 _fade_in_shape = shape;
725 save_state (_("fade in change"));
728 send_change (FadeInChanged);
732 AudioRegion::set_fade_out (FadeShape shape, jack_nframes_t len)
739 _fade_out.add (len * 0, 1);
740 _fade_out.add (len * 0.023041, 0.697222);
741 _fade_out.add (len * 0.0553, 0.483333);
742 _fade_out.add (len * 0.170507, 0.233333);
743 _fade_out.add (len * 0.370968, 0.0861111);
744 _fade_out.add (len * 0.610599, 0.0333333);
745 _fade_out.add (len * 1, 0);
749 _fade_out.add (len * 0, 1);
750 _fade_out.add (len * 0.228111, 0.988889);
751 _fade_out.add (len * 0.347926, 0.972222);
752 _fade_out.add (len * 0.529954, 0.886111);
753 _fade_out.add (len * 0.753456, 0.658333);
754 _fade_out.add (len * 0.9262673, 0.308333);
755 _fade_out.add (len * 1, 0);
759 _fade_out.add (len * 0, 1);
760 _fade_out.add (len * 0.305556, 1);
761 _fade_out.add (len * 0.548611, 0.991736);
762 _fade_out.add (len * 0.759259, 0.931129);
763 _fade_out.add (len * 0.918981, 0.68595);
764 _fade_out.add (len * 0.976852, 0.22865);
765 _fade_out.add (len * 1, 0);
769 _fade_out.add (len * 0, 1);
770 _fade_out.add (len * 0.080645, 0.730556);
771 _fade_out.add (len * 0.277778, 0.289256);
772 _fade_out.add (len * 0.470046, 0.152778);
773 _fade_out.add (len * 0.695853, 0.0694444);
774 _fade_out.add (len * 1, 0);
778 _fade_out.add (len * 0, 1);
779 _fade_out.add (len * 1, 0);
784 _fade_out_shape = shape;
787 save_state (_("fade in change"));
790 send_change (FadeOutChanged);
794 AudioRegion::set_fade_in_length (jack_nframes_t len)
796 bool changed = _fade_in.extend_to (len);
799 _flags = Flag (_flags & ~DefaultFadeIn);
803 snprintf (buf, sizeof (buf), "fade in length changed to %u", len);
807 send_change (FadeInChanged);
812 AudioRegion::set_fade_out_length (jack_nframes_t len)
814 bool changed = _fade_out.extend_to (len);
817 _flags = Flag (_flags & ~DefaultFadeOut);
821 snprintf (buf, sizeof (buf), "fade out length changed to %u", len);
826 send_change (FadeOutChanged);
830 AudioRegion::set_fade_in_active (bool yn)
832 if (yn == (_flags & FadeIn)) {
836 _flags = Flag (_flags|FadeIn);
838 _flags = Flag (_flags & ~FadeIn);
841 send_change (FadeInActiveChanged);
845 AudioRegion::set_fade_out_active (bool yn)
847 if (yn == (_flags & FadeOut)) {
851 _flags = Flag (_flags | FadeOut);
853 _flags = Flag (_flags & ~FadeOut);
856 send_change (FadeOutActiveChanged);
860 AudioRegion::set_default_fade_in ()
862 set_fade_in (Linear, 64);
866 AudioRegion::set_default_fade_out ()
868 set_fade_out (Linear, 64);
872 AudioRegion::set_default_fades ()
874 _fade_in_disabled = 0;
875 _fade_out_disabled = 0;
876 set_default_fade_in ();
877 set_default_fade_out ();
881 AudioRegion::set_default_envelope ()
885 _envelope.add (0, 1.0f);
886 _envelope.add (_length, 1.0f);
891 AudioRegion::recompute_at_end ()
893 /* our length has changed. recompute a new final point by interpolating
894 based on the the existing curve.
898 _envelope.truncate_end (_length);
899 _envelope.set_max_xval (_length);
902 if (_fade_in.back()->when > _length) {
903 _fade_in.extend_to (_length);
904 send_change (FadeInChanged);
907 if (_fade_out.back()->when > _length) {
908 _fade_out.extend_to (_length);
909 send_change (FadeOutChanged);
914 AudioRegion::recompute_at_start ()
916 /* as above, but the shift was from the front */
918 _envelope.truncate_start (_length);
920 if (_fade_in.back()->when > _length) {
921 _fade_in.extend_to (_length);
922 send_change (FadeInChanged);
925 if (_fade_out.back()->when > _length) {
926 _fade_out.extend_to (_length);
927 send_change (FadeOutChanged);
932 AudioRegion::separate_by_channel (Session& session, vector<AudioRegion*>& v) const
937 for (SourceList::const_iterator i = _master_sources.begin(); i != _master_sources.end(); ++i) {
942 /* generate a new name */
944 if (session.region_name (new_name, _name)) {
948 /* create a copy with just one source */
950 v.push_back (new AudioRegion (srcs, _start, _length, new_name, _layer, _flags));
957 AudioRegion::apply (AudioFilter& filter)
959 return filter.run (boost::shared_ptr<AudioRegion> (this));
963 AudioRegion::exportme (Session& session, AudioExportSpecification& spec)
965 const jack_nframes_t blocksize = 4096;
966 jack_nframes_t to_read;
969 spec.channels = _sources.size();
971 if (spec.prepare (blocksize, session.frame_rate())) {
976 spec.total_frames = _length;
978 while (spec.pos < _length && !spec.stop) {
981 /* step 1: interleave */
983 to_read = min (_length - spec.pos, blocksize);
985 if (spec.channels == 1) {
987 if (audio_source()->read (spec.dataF, _start + spec.pos, to_read) != to_read) {
993 Sample buf[blocksize];
995 for (uint32_t chan = 0; chan < spec.channels; ++chan) {
997 if (audio_source(chan)->read (buf, _start + spec.pos, to_read) != to_read) {
1001 for (jack_nframes_t x = 0; x < to_read; ++x) {
1002 spec.dataF[chan+(x*spec.channels)] = buf[x];
1007 if (spec.process (to_read)) {
1011 spec.pos += to_read;
1012 spec.progress = (double) spec.pos /_length;
1019 spec.running = false;
1020 spec.status = status;
1027 AudioRegion::set_scale_amplitude (gain_t g)
1029 _scale_amplitude = g;
1031 /* tell the diskstream we're in */
1034 _playlist->Modified();
1037 /* tell everybody else */
1039 send_change (ScaleAmplitudeChanged);
1043 AudioRegion::normalize_to (float target_dB)
1045 const jack_nframes_t blocksize = 64 * 1024;
1046 Sample buf[blocksize];
1047 jack_nframes_t fpos;
1048 jack_nframes_t fend;
1049 jack_nframes_t to_read;
1051 gain_t target = dB_to_coefficient (target_dB);
1053 if (target == 1.0f) {
1054 /* do not normalize to precisely 1.0 (0 dBFS), to avoid making it appear
1055 that we may have clipped.
1057 target -= FLT_EPSILON;
1061 fend = _start + _length;
1063 /* first pass: find max amplitude */
1065 while (fpos < fend) {
1069 to_read = min (fend - fpos, blocksize);
1071 for (n = 0; n < n_channels(); ++n) {
1075 if (audio_source (n)->read (buf, fpos, to_read) != to_read) {
1079 maxamp = Session::compute_peak (buf, to_read, maxamp);
1085 if (maxamp == 0.0f) {
1086 /* don't even try */
1090 if (maxamp == target) {
1091 /* we can't do anything useful */
1095 /* compute scale factor */
1097 _scale_amplitude = target/maxamp;
1101 snprintf (buf, sizeof (buf), _("normalized to %.2fdB"), target_dB);
1105 /* tell the diskstream we're in */
1108 _playlist->Modified();
1111 /* tell everybody else */
1113 send_change (ScaleAmplitudeChanged);
1117 AudioRegion::envelope_changed (Change ignored)
1119 save_state (_("envelope change"));
1120 send_change (EnvelopeChanged);
1124 AudioRegion::suspend_fade_in ()
1126 if (++_fade_in_disabled == 1) {
1127 set_fade_in_active (false);
1132 AudioRegion::resume_fade_in ()
1134 if (_fade_in_disabled && --_fade_in_disabled == 0) {
1135 set_fade_in_active (true);
1140 AudioRegion::suspend_fade_out ()
1142 if (++_fade_out_disabled == 1) {
1143 set_fade_out_active (false);
1148 AudioRegion::resume_fade_out ()
1150 if (_fade_out_disabled && --_fade_out_disabled == 0) {
1151 set_fade_out_active (true);
1156 AudioRegion::speed_mismatch (float sr) const
1158 if (_sources.empty()) {
1159 /* impossible, but ... */
1163 float fsr = audio_source()->sample_rate();
1168 boost::shared_ptr<AudioSource>
1169 AudioRegion::audio_source (uint32_t n) const
1171 // Guaranteed to succeed (use a static cast?)
1172 return boost::dynamic_pointer_cast<AudioSource>(source(n));
1177 int region_read_peaks_from_c (void *arg, uint32_t npeaks, uint32_t start, uint32_t cnt, intptr_t data, uint32_t n_chan, double samples_per_unit)
1179 return ((AudioRegion *) arg)->read_peaks ((PeakData *) data, (jack_nframes_t) npeaks, (jack_nframes_t) start, (jack_nframes_t) cnt, n_chan,samples_per_unit);
1182 uint32_t region_length_from_c (void *arg)
1185 return ((AudioRegion *) arg)->length();
1188 uint32_t sourcefile_length_from_c (void *arg, double zoom_factor)
1190 return ( (AudioRegion *) arg)->audio_source()->available_peaks (zoom_factor) ;